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"The """"Blue Goose"""" has been the symbol of the National Wildlife Refuge System since it was first drawn by Pulitzer Prize-winning cartoonist J.N. """"Ding"""" Darling, one of the greatest supporters of wildlife conservation in the 20th century. Naturalist and author Rachel Carson had a reminder...
Grade Level   3 4 5 6 7 8
Classroom Activities Curricula and Instruction
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Rocks break down into smaller pieces through weathering. Rocks and sediment grinding against each other wear away surfaces. This type of weathering is called abrasion, and it happens as wind and water rush over rocks. The rocks become smoother as rough and jagged edges break off. In this activity,...
Grade Level   3 4 5 6
Classroom Activities Curricula and Instruction
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